## Technical Overview of DR1030-151-R The **DR1030-151-R** is a high-performance, surface-mount (SMD) power inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the DR Series, which is characterized by its shielded drum core construction, providing low magnetic interference and high power density. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 150 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.505 Ω (Typical) | | **Rated Current (Irms)** | 0.81 Amps | | **Saturation Current (Isat)** | 1.05 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Characteristics The component is designed for automated assembly and space-constrained environments. * **Package/Case:** 10.3mm x 10.5mm (approximate footprint). * **Height:** 3.0mm (Max), making it suitable for low-profile electronics. * **Construction:** Ferrite drum core with a ferrite sleeve to contain magnetic flux, reducing Electromagnetic Interference (EMI) with neighboring components. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DR** | Series Name (Drum Core, Shielded) | | **1030** | Dimensions (approx. 10mm width, 3.0mm height) | | **151** | Inductance Code ($15 \times 10^1 = 150 \mu H$) | | **R** | RoHS Compliant / Lead-Free | --- ### 4. Common Applications Inductors of this specification are primarily used for energy storage and filtering in power management circuits: 1. **DC-DC Converters:** Buck, Boost, and SEPIC topologies. 2. **LED Drivers:** Providing steady current to lighting arrays. 3. **Battery Powered Devices:** Used in tablets, laptops, and portable medical equipment due to its low profile. 4. **Noise Filtering:** Smoothing ripples in power supplies to protect sensitive ICs. --- ### 5. Selection Considerations * **Saturation:** Ensure the peak current in your circuit does not exceed the **Isat (1.05A)**, or the inductance will drop significantly. * **Thermal Management:** The **Irms (0.81A)** rating is based on a temperature rise (usually 40°C). Ensure adequate airflow or copper traces to dissipate heat. ---